Choose the grammatically correct sentence:

The correct answer is Option (3) → The puppy kept chewing my sandals, so I picked them up and put them in the cupboard.

A phrasal verb with a pronoun object:

• A phrasal verb is a verb joined with a small word such as up, out or together. The two words together have a new meaning.
• When the object is a pronoun such as “it” or “them”, it goes between the verb and the small word.
• Here the sentence says picked them up, not “picked up them”.

Why the Other Options are Incorrect?

Option 1: Could you explain me the last step of this sum once more? — Incorrect. “Explain” does not take the person straight after it. The person comes after “to”.
Corrected: Could you explain the last step of this sum to me once more?

Option 2: Rahul has never been to Ladakh, and neither I have. — Incorrect. After “neither”, the helping verb comes before the subject. “Neither I have” is wrong.
Corrected: Rahul has never been to Ladakh, and neither have I.

Option 4: Our maths teacher always is on time for the first period. — Incorrect. Words like “always” come after “am / is / are / was”. “Always is” is wrong.
Corrected: Our maths teacher is always on time for the first period.