Identify the grammatically correct sentence from the following :

(A) According to the draft rules, social media platforms must seek verification from a proposed self regulatory body.
(B) Hally War was just 10 when an idea took root in his mind.
(C) 'Tadok' is a term used by the Adi community and also means a necklace made with colourful beads.
(D) Sania Mirza had been decided to draw curtains on her illustrious career at next month's Dubai Tennis Championship.

Choose the correct answer from the options given below :

(A), (B) and (C) Only

Out of the provided options, the grammatically correct sentences are: (A), (B) and (C) Only

Here's why:

• (A) is grammatically correct and clear. It uses the appropriate verb tense ("must seek") and sentence structure to convey the requirement for social media platforms.
• (B) is also grammatically correct. It uses the past tense ("was") to indicate a past event and employs a natural sentence structure.
• (C) is grammatical and uses parallel structure ("used by" followed by "means") to explain the term "Tadok."
• (D) is incorrect because it uses the passive voice ("had been decided") in an awkward way. It would be more natural to say "Sania Mirza has decided to draw curtains on..." or "It has been decided that Sania Mirza will draw curtains on..."

Therefore, only sentences (A), (B), and (C) are free from grammatical errors and use accurate phrasing. Sentence (D) require adjustment for clearer and grammatically correct structure.