What is the length of the longest pole which can be kept in a room 6 m long, 4 m broad and 3 m high?	Choose the most appropriate option:
A) 7	B) 9	C) 11	D) 13	E) None
Nonexplanation:   d2 = 62 + 42 + 32 = 7.8   None)
<result>E</result>
What is the length of the longest pole which can be kept in a room 6 m long, 4 m broad and 3 m high?