An asteroid travelling through space collides with one end of a long cylinderica

Question

An asteroid travelling through space collides with one end of a long cylinderical satellite . And sticks to the satellite. Which of the following is true of the isolated asteroid-satellite system in this collision?

A) total energy is conserved, angular momentum is not conserved.
B) angular momentum is conserved , but linear momentum is not conserved.
C) angular momentum is conserved , total energy is conserved.

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I'm confused . When is linear and angular momentum are conserved ? And what does it exactly mean"conserved"?!
Please explain and answer the MCQ !

Explanation / Answer

it is an inelastic collision so energy is not conserved as there are no external forces acting linear moment must be coserved It seems to me that no option is correct ,none of the above when there are no external forces on the total system then linear moment is conserved when there are no external torques then angular moment is conserved conserved means :'' '' of Total system before the collision =" "of total system after collision

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