​Which of the following combinations would best characterize the dominant phase of the life cycle of a pteridophyte?​

Correct option is C

Explanation-

Pteridophytes exhibit alternation of generations, which includes:
                  1.   A haploid gametophyte phase (produces gametes)
                  2.   A diploid sporophyte phase (produces spores)
Dominant Phase  -  Diploid Sporophyte
The sporophyte is the main plant body in pteridophytes (like ferns). It is photosynthetic, large and independent. It is diploid (2n).
The gametophyte is haploid (n), small, short-lived, and often independent but not dominant.

Incorrect options-

Option a -  Diploid gametophyte  - Gametophytes are always haploid.
Option b -  Haploid gametophyte -   True phase, but not the dominant one in pteridophyte.
Option d - Haploid sporophyte -  Sporophytes are always diploid

Final Answer: Option c - Diploid sporophyte 
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