He is (1)/ capable to do this work (2)/ within the stipulated period. (3)/ No error (4).

Options

A. 1. He is
B. 2. capable to do this work
C. 3. within the stipulated period.
D. 4. No error

Answer

2

Explanation

capable of doing will replace capable to do because capable agrees with of (Prep.) and - ing
Verb (Gerund).
Look at the examples given below:
I am perfectly capable of doing it myself. Theworkers are capable of running the organisation them selves. Hence, capable of doing this workis the right usage.