If a projectile explods in mid air then just before and just after explosion, choose correct option(s)

Projectile Explodes In Air

Assertion: If a projectile explodes in mid air, then no external force acts on the projectile during explosions. Reason: Center of mass in this case follows the same path.

A canon shell explodes in mid air, its total

Two projectiles collide in air, then for just after and before the collision