Explanation : In non-persistent HTTP, each packet takes 2 RTT (Round trip Time): one for TCP connection, one or HTTP Text (Image file As, it is given text and 5 images that totals 6 objects.)
So, it takes 12 RTT in total. But,
12 RTT includes 6 HTTP connections + 6TCP connections.
So, the minimum number of TCP connections required is 6.