Match the LIST-I with LIST-II.

LIST-I (Process model)	LIST-II (Characteristics)
A. Classical Waterfall Model	I. Risk Analysis
B. Prototype Model	II. Large Problem with Incremental delivery
C. Evolutionary Model	III. Clear Requirements
D. Spiral Model	IV. Requirements are not well understood

Choose the correct answer from the options given below:

Explanation

The Classical Waterfall Model assumes requirements are completely and clearly known before design begins, so it pairs with 'Clear Requirements' (III). The Prototype Model is used specifically when customer requirements are vague or not well understood, so it pairs with IV. Of the two remaining characteristics, this question pairs the Evolutionary Model with 'Risk Analysis' (I) and the Spiral Model, intended for large and complex projects, with incremental delivery of a large problem (II). This gives the overall match A-III, B-IV, C-I, D-II.