• Bidi Tobacco (Nicotiana rustica and specialized N. tabacum cultivars): Synthesizes and accumulates the highest nicotine content (typically 5.0% to 8.0% or higher) due to low topping, close spacing, and specific alkaloid biosynthesis genetics.
• Chewing Tobacco: Contains moderate to high nicotine (3.0% to 4.5%).
• Cigar Tobacco: Contains moderate nicotine (1.5% to 3.0%).
• Cigar Wrapper Tobacco: Contains the lowest nicotine level (0.5% to 1.2%) to provide mild burning aroma without harshness. (Correct answer: Option 1)

• Formula for Field Water-Use Efficiency (WUE):

$$\text{Field WUE} = \frac{\text{Crop Yield (kg/ha)}}{\text{Total Water Used (ha-mm)}}$$

• Given Values:
• Grain Yield = $4.5\text{ t/ha} = 4.5 \times 1000 = 4,500\text{ kg/ha}$
• Water Requirement = $45\text{ cm} = 45 \times 10 = 450\text{ mm}$
• Calculation:

$$\text{Field WUE} = \frac{4,500\text{ kg/ha}}{450\text{ mm}} = 10\text{ kg/ha-mm}$$

• Conclusion: The field water-use efficiency of the wheat crop is 10 kg/ha-mm. (Correct answer: Option 2)