written (Adjective) : not oral
oral (Adjective) : spoken rather than written; connected with mouth
correct (Adjective) : right and accurate
mental (Adjective) : connected with mind
verbal (Adjective) : relating to words ; spoken ; relating to verbs

Correct Option: A

written (Adjective) : not oral
oral (Adjective) : spoken rather than written; connected with mouth
correct (Adjective) : right and accurate
mental (Adjective) : connected with mind
verbal (Adjective) : relating to words ; spoken ; relating to verbs

corrupt (Verb) : not honest
honest (Adjective) : trustworthy
infect (Verb) : to make a disease or an illness spread
cleanse (Verb) : to clean your skin/or a wound
pollute (Verb) : to add dirty or harmful substances to air land, water etc. so that it may no longer be pleasant or safe to use

Correct Option: C

corrupt (Verb) : not honest
honest (Adjective) : trustworthy
infect (Verb) : to make a disease or an illness spread
cleanse (Verb) : to clean your skin/or a wound
pollute (Verb) : to add dirty or harmful substances to air land, water etc. so that it may no longer be pleasant or safe to use

yielding (Adjective) : willing to do what other people want
adamant (Adjective) : determined not to change your mind or to be persuaded about something
satisfied (Adjective) : full of satisfaction
comfortable (Adjective) : full of comfort
luxurious (Adjective) : comfortable ; containing expensive and enjoyable things

Correct Option: C

yielding (Adjective) : willing to do what other people want
adamant (Adjective) : determined not to change your mind or to be persuaded about something
satisfied (Adjective) : full of satisfaction
comfortable (Adjective) : full of comfort
luxurious (Adjective) : comfortable ; containing expensive and enjoyable things

optional (Adjective) : that you can choose to do or have if you want to
compulsory (Adjective) : mandatory; that must be done because of a law/a rule
easy (Adjective) : that is simple to do
unnecessary (Adjective) : not required/needed; not necessary
mandatory (Adjective) : compulsory; required by law

Correct Option: B

optional (Adjective) : that you can choose to do or have if you want to
compulsory (Adjective) : mandatory; that must be done because of a law/a rule
easy (Adjective) : that is simple to do
unnecessary (Adjective) : not required/needed; not necessary
mandatory (Adjective) : compulsory; required by law

definite (Adjective) : fixed
tentative (Adjective) : not definite/certain because you may want to change it later ; hesitant ; provisional ; experimental insufficient (Adjective) : not sufficient; not enough
plentiful (Adjective) : abundant; available/existing in large amounts/numbers
active (Adjective) : always busy

Correct Option: A

definite (Adjective) : fixed
tentative (Adjective) : not definite/certain because you may want to change it later ; hesitant ; provisional ; experimental insufficient (Adjective) : not sufficient; not enough
plentiful (Adjective) : abundant; available/existing in large amounts/numbers
active (Adjective) : always busy