A boat is being rowed in a river. Air is also blowing. Direction of velocity vectors of boat, water and air in ground frame are as shown in diagram.

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v b ​ ↑ , v w ​ → , v a ​ ↗ (P) v b / w ​ = v b ​ − v w ​ =↑ − →=↖⇒ 1 (Q) v a / b ​ = v a ​ − v b ​ =↗ − ↑=↘⇒ 4 (R) v w / b ​ = v w ​ − v b ​ =→ − ↑=↘⇒ 4 (S) v a / w ​ = v a ​ − v w ​ =↗ − →=↑⇒ 1 P → 1 , Q → 4 , R → 4 , S → 1 ​ A n s = ( A ) ​

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JEE Advanced (2028)