veca=hati-hatj+hatk and vecb=2hati+4hati...

`veca=hati-hatj+hatk and vecb=2hati+4hati+3hatk` are one of the sides and medians respectively of a triangle through the same vertex, then area of the triangle is (A) `1/2 sqrt(83)` (B) ` sqrt(83)` (C) `1/2 sqrt(85)` (D) `sqrt(86)`

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`veca=hati-hatj+hatk and vecb=2hati+4hati+3hatk` are one of the sides and medians respectively of a triangle through the same vertex, then area of the triangle is (A) `1/2 sqrt(83)` (B) ` sqrt(83)` (C) `1/2 sqrt(85)` (D) `sqrt(86)`

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