kindly help me to find out solution of this question?

Initial temperature = (273 - 115) K = 158 K

When the thermal energy is doubled:
Final temperature = 158 × 2 K = 316 K = (316 - 273) °C = 43 °C > 34°C

Since the final temperature is higher than the designed melting point of the chocolate, the chocolate bar WILL MELT.

I never do things people ask me to "kindly" do because the only people who say "kindly" are from India, so I can't be confident they'll even understand.