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The unit vector which are perpendicular to both the vectors   and  are , 

Answer (Detailed Solution Below)

Option 1 :
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Detailed Solution

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Concept:

If  perpendicular to both the vectors  and   then 

Unit vector,   

Calculation :

Here the given vectors are,   and  , 

Let, vector  are perpendicular to both the vectors, 

So,   

⇒  

⇒  

∴  =  

Hence the unit vector perpendicular to both the vectors are, 

 =  

⇒  

The correct option is 1. 

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