If R⃗ = îx + ĵy + k̂z, then the correct identity is:

PYQ UPPSC LT Grade (Assistant Teacher) 2025

1. A.

   grad(1/R) = 0

2. B.

   div R⃗ = 0

3. C.

   div R⃗ = 3

4. D.

   curl R⃗ = 3

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