Q 1722623531.     `A=5hati+4hatk` and `B=2hati-4hatj,R = A-B== ... X ...`
Here, `X` refers to

A

`4hati+4hatj+4hatk`

B

`3hati+4hatj+4hatk`

C

`5hati+4hatj+4hatk`

D

None of the above

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