In these questions, two/three statement followed by two conclusions numbered I and II have been given. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows the given statements?  Given answer : 
A. If only conclusion I is true 
B. If both conclusions I and II are true 
C. If either conclusion I or II is true 
D. If only conclusion II is true 
E. If neither conclusion I nor II true  Statements :
Some planets are stars.  All stars are comets.  No comet is an astronaut.