An aeroplane is moving with horizontal velocity \[u\] at height \[h\]. The velocity of a packet dropped from it on the earth's surface will be (\[g\] is acceleration due to gravity) [MP PET 1995]

• A. \[\sqrt{{{u}^{2}}+2gh}\]
• B. \[\sqrt{2gh}\]
• C. \[2gh\]
• D. \[\sqrt{{{u}^{2}}-2gh}\]