In Each Reaction Box, Place The Best Reagent And Conditions From The List Below.

Here are some possible reagents and conditions for each reaction:

1. LDA Thf: This reagent is typically used as a strong base for deprotonation reactions. THF (tetrahydrofuran) is a common solvent for LDA. Possible reaction: Deprotonation of an acidic hydrogen to form an enolate intermediate.

2. CH3Br: This is a methylating agent and can be used to introduce a methyl group into a molecule. Possible reaction: Methylation of a nucleophile or substrate.

3. Br2, H3O+: Br2 is a halogenation reagent and H3O+ is a source of acidic protons. Possible reaction: Electrophilic halogenation of an aromatic ring.

4. Pyridine: This is a basic reagent and can be used to deprotonate acidic hydrogens. It can also act as a nucleophile in certain reactions. Possible reaction: Nucleophilic substitution or deprotonation of an acidic hydrogen.

5. NaCN: This is a source of cyanide ions and can be used in nucleophilic substitution reactions. Possible reaction: Nucleophilic substitution of a leaving group to form a cyanide-substituted product.

6. H2O: This is a common solvent and can be used in a variety of reactions. Possible reaction: Hydrolysis of a compound to form its hydrolyzed products.