Final answer:
The five consonants and one vowel that contestants receive for the bonus round puzzle on Wheel of Fortune are R, E, S, T, N, L.
Step-by-step explanation:
The five consonants and one vowel that contestants receive for the bonus round puzzle on Wheel of Fortune are: a) R, S, T, L, N, E. These are the default letters provided to contestants in the bonus round to give them a head start in solving the puzzle. After receiving these letters, contestants are then asked to choose three more consonants and one more vowel. The combination of these letters aims to offer a foundation for solving the puzzle while still requiring additional guesses and strategic letter choices to unveil the complete phrase or word. Options b, c, and d do not match the standard set of letters provided in the bonus round.