In a region of sphere, the gravitational potential is represented by V = 2x + 3y – z . Then gravitational field strength is

Q: In a region of sphere, the gravitational potential is represented by V = 2x + 3y – z . Then gravitational field strength is

(a) $ 2\hat{i} + 3\hat{j} – \hat{k} $

(b) $ 2\hat{i} – 3\hat{j} + \hat{k} $

(c) $ -2\hat{i} – 3\hat{j} + \hat{k} $

(d) $ -2\hat{i} – 3\hat{j} – \hat{k} $