If \({\rm{\vec a}} = 2{\rm{\hat i}} + 3{\rm{\hat j}} + 4{\rm{\hat k}}\ – McqOptions

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1.	If \({\rm{\vec a}} = 2{\rm{\hat i}} + 3{\rm{\hat j}} + 4{\rm{\hat k}}\) and \({\rm{\vec b}} = 3{\rm{\hat i}} + 2{\rm{\hat j}} - {\rm{\lambda \hat k}}\) perpendicular, then what is the value of λ
A.	2
B.	3
C.	4
D.	5
Answer» C. 4

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