A shell, in fight explodes into four unequal parts. Which is conserved ?

A shell in its flight, explodes into four unequal parts. Which of the following is conserved?

A shell in flight explodes into four unequal parts. Which of the following is conserved?

A shell in its flight, explodes into four unequal parts. Which of the following is conserved?

A shell in its flight, explodes into four unequal parts. Which of the following is conserved?

A shell is thrown vertically up. The shell at the highest point explodes into two equal fragments. The centre of mass of the two fragments.

A shell fired from a gun explodes into pieces in air .How is the centre of mass of the shell affected?