NEET Biology question

Microbial experiments show that...A... advantageous...B... when selected will result in observation of new phenotypes. Over few generations, this would result in...C.... Natural selection is a process in which...D... variations enabling better survival are enabled to reproduce and leave greater number of progeny Choose the correct option for A, B, C and D to complete the given NCERT statement

• (A)A-post existing, B-mutation, C-speciation, D- heritable
• (B)A-post existing, B-mutation, C-speciation, D- unheritable
• (C)A-pre-existing, B-mutation, C-speciation, D- heritableCorrect
• (D)A-existing, B-mutation, C-speciation, D- heritable