Four of the following five are alike in a certain way

In the following question select the answer pair that expresses a relationship most similar to that expressed in the capitalised pair.

Something which is likely to decay quickly

The team made a valiant effort to win the match despite their injuries.

Come, take a ________.

Select the option that can be used as a one-word substitute for the given group of words.

Something no longer in use

Find out the wrongly spelt word and mark that option as the answer.

Blend

DELINEATE

Select the most appropriate antonym of the given word.

SPARSE

Select the most appropriate synonym of the given word. 

MOTIVE