Which of the following reagent is not used to carry out the reaction

Which of the following reactants are used to carry out the thermite reaction requried for welding the broken railway tracks?

Which of the following reagents can be used for the reaction given below ?

Which of the following reagents can be used for the reaction given below ?

Which of the following reagents is used for the preparation of citric acid used Reformatsky reaction ?

Which of the following methods can be used to carry out the following conversions?

Which of the following reagents would carry out the following transformation ? (D = .^(2)H)

Which one of the following work best to carry out the reaction?