Which of the following is/are the condition(s) precedent to valid retrenchment of a workman under the Industrial Disputes Act, 1947 ? 1. The workman has been given one month's notice in writing indicating the reasons for retrenchment 2. The workman has been paid at the time of retrenchment compensation which shall be equivalent to fifteen days' average wages for every completed year of continuous service 3. The workman has been paid, at the time of retrenchment, compensation which shall be equivalent to wages of thirty days service Select the correct answer using the code given below :