This is the case of "unless X, Y" so in this case negation of one statement will be followed by other statement.

Correct Option: B

This is the case of "unless X, Y" so in this case negation of one statement will be followed by other statement.

correct combination is (i) and (iii) and also (iv) and (ii)

Correct Option: D

correct combination is (i) and (iii) and also (iv) and (ii)

The correct conclusion should be:
Susmit is sad that means he met with his girlfriend[ii and iii]
Susmit didn't meet his girlfriend so he must be happy [iv and i]

Correct Option: C

The correct conclusion should be:
Susmit is sad that means he met with his girlfriend[ii and iii]
Susmit didn't meet his girlfriend so he must be happy [iv and i]

It is the case of "Unless X , Y" the conclusion is:
Boss is not present means employees don't work. [ii and iv]
Employee work means boss is present. [iii and i]

Correct Option: B

It is the case of "Unless X , Y" the conclusion is:
Boss is not present means employees don't work. [ii and iv]
Employee work means boss is present. [iii and i]

This is the case of If X then Y the conclusion should be:
You don't saved money means you will not get reward. [ii and iv]
You got reward means you saved money. [iii and i]

Correct Option: C

This is the case of If X then Y the conclusion should be:
You don't saved money means you will not get reward. [ii and iv]
You got reward means you saved money. [iii and i]