Biological weapons detectors are currently deployed aboard:

Biological weapons detectors are designed to identify and assess biological threats, which can arise in various environments, including land, air, and sea. While it may seem that these detectors would be limited to specific platforms, the reality is that they are employed in a range of military applications to provide comprehensive situational awareness and defense capabilities.

The answer indicating that none of the provided options are correct reflects the understanding that biological weapons detectors are not restricted exclusively to aircraft, naval vessels, or ground forces. Instead, they are utilized across multiple branches of the military and are capable of being deployed in diverse settings, including but not limited to ground, air, and maritime platforms.

This versatility allows armed forces to maintain readiness and responsiveness against biological threats, whether they are on the battlefield, in the air, or at sea. Therefore, the correct choice emphasizes the broad application of these detection systems beyond the specified categories, underlining the need for an integrated approach to biological threat assessment in military operations.