How is a straight flush defined in poker?

• A. Cards that are all the same color
• B. Cards that are in sequential order and of the same suit
• C. Cards that are all the same nominal
• D. Cards that are of different suits and in a sequence

Answer: (B)

A straight flush in poker is defined as a hand containing five consecutive cards that all share the same suit. This means that not only must the cards be in sequential order—like 5, 6, 7, 8, and 9—but they must also belong to the same suit, such as all hearts or all spades. This distinction is crucial, as it combines the concepts of both a straight (which is simply a sequence of cards) and a flush (which involves all cards being of the same suit). Thus, option B accurately captures the full definition of a straight flush as it includes both necessary conditions: the sequential order and the same suit.

In contrast, the other options do not meet the criteria for a straight flush; for example, being "all the same color" does not guarantee that the cards are in sequence or of the same suit. Cards being "all the same nominal" refers to having cards of the same rank, which is not relevant in defining a straight flush. Lastly, having "different suits and in a sequence" directly contradicts the requirement of all cards being in the same suit for it to qualify as a straight flush.