Identify Non-Land Ballistic Missile

This solution identifies the missile type that is not land-based from the provided options. It involves understanding the operational basing of different ballistic missiles.

Missile Basing Analysis

To determine which missile is not land-based, let's examine each option:

• Agni: This is a family of medium to intercontinental range ballistic missiles, primarily operated from land-based mobile launchers and silos. It is a land-based system.
• Prithvi: Developed as India's first ballistic missile, the Prithvi series are surface-to-surface missiles deployed using road-mobile launchers or static pads. It is land-based.
• Surya: Often discussed in the context of advanced or future ballistic missile programs, conceptualized as a potential land-based ICBM or hypersonic system. It is intended for land-based deployment.
• Dhanush: This missile is a naval variant derived from the Prithvi missile. It is specifically designed for launch from naval warships, making it a sea-based ballistic missile.

Based on the analysis, the Dhanush missile is the only one among the options that is not land-based, as it is operated from ships.