He practices hard to make a century. (complex)

A He practices hard ,he may make a century.

B He practices hard but he may make a century.

C He practices hard and he may make a century.

D He practices hard so that he may make a century.

Correct Answer: Option D

Simple Sentence এর Principal Clause + to + verb এর জন্য Complex Sentence এ So that/in order that বসে।