Choose the cation that will produce a very soluble salt in nonpolar solvents when paired with tetraphenylborate (C₂₄H₂₀B^-) which is a bulky anion.

Chemical structure of a cation with a bulky tetraphenylborate anion.

Chemical structure of a cation with multiple phenyl groups and a bulky tetraphenylborate anion.

Chemical structure of a cation with a phosphorus atom and surrounding hydrocarbons.

Chemical structure of a tetrahedral cation with four methyl groups.

Choose the cation that will produce a very soluble salt in nonpolar solvents when paired with tetraphenylborate (C24H20B-) which is a bulky anion.