Which of the following ratio is not derived from profit

Choose the one which best expresses the meaning of the given word .

Nebulous

Choose the most appropriate synonym of the given word.  

COGENT

The two parties signed a lengthy _________.

It took a lot of time in making both of them come to a comfortable mutual ___________.

In each of the following sentences, choose the word  opposite in meaning to the bold word to fill in the blank.

Although unwilling to do so, he came to the conclusion that no other scheme is practicable-

Select the correct conclusion based on the meaning of the highlighted idiom:

choose the option which represents a pair of either synonyms or antonyms.

Select the most appropriate synonym of the given word.

Aromatic

Select the most appropriate opposite of the Given word :

FORMER