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Vectors a and b are inclined at angle θ = 120°, If |a| = 1, |b| = 2, then [(a + 3b) x (3a - b)]^2 is equal to A. 300 B. 325 C. 275 D. 225

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Vectors a and b are inclined at angle θ = 120°, If |a| = 1, |b| = 2, then [(a + 3b) x (3a - b)]2 is equal to

A. 300

B. 325

C. 275

D. 225

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Correct option is A. 300

= 300

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