Select the most appropriate word to fill in the blank.
The government has opened many new centres of excellence to train teachers in conducting online classes ______.

Correct option is A

The correct option to fill in the blank is (a) effectively.
Effectively is an adverb that means "in such a manner as to achieve a desired result." (प्रभावशाली ढंग से)
Example: The teacher managed the online session effectively despite technical issues.
Explanation: Since the sentence discusses improving teacher training for online classes, the goal is to make teaching effective. Hence, the adverb effectively is the best fit.
Why other options are incorrect:
· (b) Hopefully – With hope (उम्मीद से) – irrelevant to method of conducting classes
· (c) Certainly – Without doubt (निश्चित रूप से) – implies assurance, not method
· (d) Automatically – Without human intervention (स्वतः) – incorrect context