Fill in correct prepositions in the blanks selecting from the options given below :-

Rohit was grateful _______  his master _______ many favours.

to - for

The correct option is "to" - "for". The complete sentence is:

Rohit was grateful to his master for many favours.

This sentence effectively expresses Rohit's gratitude towards his master for the favors he has received. The preposition "to" indicates the recipient of Rohit's gratitude, while the preposition "for" specifies the reason for his gratitude.