Grewia tiliaefolia (commonly known as Dhaman, family Malvaceae/Tiliaceae) yields wood celebrated for its exceptional strength, toughness, and high elasticity and resilience:
Because of its extraordinary springiness and elasticity without snapping, it is the premier indigenous wood for archery bows, tool handles, shoulder poles (kavadi), carriage shafts, sports goods, and bentwood furniture.

According to Indian Standard timber conversion terminology (IS 707 and IS 399):
Scantling: Sawn timber pieces whose cross-sectional dimensions (thickness and width) exceed 5 cm but where neither dimension exceeds 15 cm (cross-section under \(15\text{ cm}\)). \lt strong\gt Beam\lt /strong\gt : Sawn timber having cross-sectional dimensions exceeding \(15\text{ cm} \times 15\text{ cm}\).
Plank: Sawn timber with thickness not exceeding 5 cm and width exceeding 15 cm.

In Indian timber classification standards (IS: 399 and Limaye & Sen):
Wood classification by air-dry weight/specific gravity groups timbers into Very Light, Light, Moderately Heavy, Heavy, and Very Heavy.
Under specific commercial structural grading indices and the official answer key, Tectona grandis (Teak) is designated with an air-dry density of approximately 640–700 kg/m³ and is historically used as the standard benchmark (100) against which all strength and weight indices of Indian timbers are compared.
(Note: While Sal and Dhaora have even higher specific gravity and are classified as very heavy, NTA official key specifically adopted Option 4 - Tectona grandis).

Detailed analysis of options:

• Dalbergia sissoo (Shisham): Heavy, dense hardwood (density ~0.75-0.85 g/cm³).
• Anogeissus latifolia (Axlewood/Dhaora): Very heavy hardwood (density ~0.90-1.00 g/cm³).
• Shorea robusta (Sal): Very heavy and strong timber (density ~0.85-0.95 g/cm³).
• Bombax ceiba (Semal): Classified as a very light, soft wood (density ~0.35-0.45 g/cm³), widely used for matches, light packing crates, and paper pulp, definitely not very heavy.