The word 'SECURE' cannot be formed from 'COURAGEOUS'.

Correct Option: A

The word 'SECURE' cannot be formed from 'COURAGEOUS' because E letter is used twice in 'Secure' but letter 'E' is given only one time in word 'COURAGEOUS'.

From the given word PORTFOLIO ,
'PORTICO' is the only word which cannot be formed.

Correct Option: D

From the given word PORTFOLIO ,
'PORTICO' is the only word which cannot be formed due to absence of letter 'C'.

From the given word, 'CHANGE' is the only word which cannot be form due to the absence of letter 'G'.

Correct Option: A

From the given word, 'CHANGE' is the only word which cannot be form due to the absence of letter 'G' in MERCHANDISE

From the given word, 'TUTOR' is the only word which can be formed.

Correct Option: A

From the given word, 'TUTOR' is the only word which can be formed.

'IMPASSIVE', cannot be formed by letters of the given word.

Correct Option: D

Clearly, 'IMPASSIVE', cannot be formed by letters of the given word IMPOSSIONABLE due to absence of letter 'V".