Utilizable surface water potential among major Indian peninsular river basins (CWC data):
Godavari Basin: ~76.3 BCM (highest among all peninsular rivers; total water potential is ~110.5 BCM).
Krishna Basin: ~58.0 BCM (total potential ~78.1 BCM).
Mahanadi Basin: ~50.0 BCM (total potential ~66.9 BCM).
Narmada Basin: ~34.5 BCM (total potential ~45.6 BCM).
Among the options given, the Godavari basin has the maximum utilizable surface water resources.

Empirical rainfall-runoff relationships developed for Indian catchments:
(A) Binnie's percentages: Developed by Sir Alexander Binnie for rivers in Madhya Pradesh (III) (formerly Central Provinces, based on observations near Nagpur).
(B) Strange's curves and tables: Formulated by W.L. Strange for the Bombay-Deccan catchment (I), classifying catchments as good, average, and bad.
(C) Barlow's tables: Developed by T.G. Barlow based on observations of 19 small catchments in Uttar Pradesh (II).
(D) Lacey's formula: Developed by Gerald Lacey for alluvial plains of the Indo-Gangetic plain (IV), incorporating catchment factor \(S\) and monsoon rainfall.

Precipitation Statistics of India:

• National Mean Rainfall: According to India Meteorological Department (IMD) climatological normals, the country receives an average annual precipitation of approximately $1,194\text{ mm}$, which equals $119.4\text{ cm}$ (or roughly $120\text{ cm}$ / $4,000\text{ billion cubic meters}$). Option 1 has wrong units ($119.4\text{ mm}$ is ten times too small), while Option 3 ($11.94\text{ m}$) is ten times too large.
• Therefore, $119.4\text{ cm}$ is the correct figure (Option 2).