Answer: b. 2
Explanation: but he stopped on the way is the mistake.
The conjunction has been wrongly used.
Although is always followed by yet and never by but.
The conjunction 'Although ------ yet' is used to express two contrary qualities or actions of a person.
The correct sentence will be: Although he was late, yet he stopped on the way to have coffee with his friends.
Answer: a. 1
Explanation: She was taking care of her baby for two hours is the mistake.
"was taking" should be replaced by "had been taking"
The correct sentence will be: She had been taking care of her baby for two hours before she was called by her mother.
Answer: b. 2
Explanation: when he is the mistake.
The conjunction 'No sooner ---- than' is also used to denote simultaneous actions.
No sooner is always followed by than and not when.
The word 'when' should be replaced with 'than'.
Correct sentence: No sooner did he see his teacher than he stopped copying.
Answer: b. 2
Explanation: I would also go is the mistake.
Replace "I would also go" with "I would have also gone".
Among two actions of past probability, one action depending on the other should have past perfect and future perfect.
In such cases,
1) The principle clause should be in future perfect
2) The subordinate clause should be in past perfect.
In the given sentence, the principal clause should have been, I would have also gone.
The given sentence can be corrected in following ways:
1) Had you been to Mumbai, I would have also gone with you.
2) If you had gone to Mumbai, I would have also gone
Answer: a. 1
Explanation: She ran so fastly is the mistake.
Generally, 'ly' is added to adjectives to form adverbs.
(For example: slow - slowly, quick - quickly).
Fast is both an adjective and an adverb, hence 'ly' is not required. It is not used in English language.
Correct sentence: She ran so fast that she was able to catch the running bus.
Answer: b. 2
Explanation: but he never told me is the mistake.
Replace "he never told me" with "he did not tell me".
The correct sentence will be: He met me two days ago but he did not tell me about his grandmother's death.