Team size — Water polo on-field players In standard international rules for water polo, how many players from one team are in the water at the same time (including the goalkeeper)?

Introduction / Context:
Understanding team sizes is foundational sports knowledge. Water polo, an intense aquatic team game, fields a specific number of players simultaneously, which often appears in competitive exams.

Given Data / Assumptions:

• The question asks for the number of players per team in play at one time (in the water).
• Goalkeeper inclusion is explicitly mentioned.

Concept / Approach:
Under standard rules, each water polo team fields 7 players at a time: 6 field players and 1 goalkeeper. Substitutions are allowed, but on-field (in-water) strength remains seven unless there are exclusions or penalties.

Step-by-Step Solution:
Recall standard composition → 6 field players + 1 goalkeeper.Total in water at once = 7 per team.Select '7'.

Verification / Alternative check:
Rulebooks and Olympic event guides state seven players per side are in play, matching the common format recognized worldwide.

Why Other Options Are Wrong:
4 / 5 / 6 / 8: These numbers do not match the standard full-strength line-up in regulation water polo play.

Common Pitfalls:
Confusing squad size (including substitutes) with the number of active players in the water, or mixing rules with other aquatic sports like synchronized swimming or relay events.

Final Answer:
7